I can't help stupid people. They will always be stupid. I'm as embarrassed by the people you speak of as I am of the idiots who put that billboard up. The belief that one needs no cultural and/or theological context to understand ancient texts (whether it be the Bible, the Quran or hell, even Shakespeare) is both shockingly ignorant and often dangerous. Imposing modern, western thought on texts written in other times for other people doesn't work, no matter how much one desires. That goes for both sides.